From patchwork Wed May 10 07:52:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Kurapati X-Patchwork-Id: 13236584 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 13194C77B7D for ; Wed, 10 May 2023 07:53:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236281AbjEJHxY (ORCPT ); Wed, 10 May 2023 03:53:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45006 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236228AbjEJHxW (ORCPT ); Wed, 10 May 2023 03:53:22 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 84805DE; Wed, 10 May 2023 00:53:21 -0700 (PDT) Received: from pps.filterd (m0279862.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34A4u4wL024070; Wed, 10 May 2023 07:53:11 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=qcppdkim1; bh=qtaD07TouvINu2QPk+H8FEJRWtVe9CQqLpxqtc/q7Zc=; b=UusSnrCnx9GzHXchMajoQM+OePiznofow7kyp2Pd7QaoAVnvAQHhpjYkaHGwiss9uKYC gZkZsB0Uyjx9QOabZvsuCdl9OSJhQpxVjgvwolDrruiA7P97/9VXJGsOMVF6YqgBll4U IKKBzIobhSVodw0xbhFnA7f0HG3Ry4sua+aQeY3IIcS6cl0Ns+uv+2pQORZkfSGFdnqG HcQA/j5v7vHaKOBIE1piI2WIxx281+LkKHxh+a3SgdSa+V2uEwUOr3u8DlT6c7bJhHlt 8flWNDC0qv0hTrTOmxW4WuRQMtF3oWm8gnTvOnFQ3pfncFu5aLxOzNGzI6tjyXLQ9cIE gQ== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3qg1g10k9x-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 May 2023 07:53:10 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 34A7rAB2031805 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 May 2023 07:53:10 GMT Received: from hu-kriskura-hyd.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Wed, 10 May 2023 00:53:06 -0700 From: Krishna Kurapati To: Thinh Nguyen , Greg Kroah-Hartman , Alan Stern , "Jiantao Zhang" , Badhri Jagan Sridharan CC: , , , , , Krishna Kurapati Subject: [PATCH v3 0/2] Handle core soft reset failure in pullup Date: Wed, 10 May 2023 13:22:50 +0530 Message-ID: <20230510075252.31023-1-quic_kriskura@quicinc.com> X-Mailer: git-send-email 2.40.0 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: yNtX8nqs0JdP-AsT3Ybx3D7g6DapygFP X-Proofpoint-ORIG-GUID: yNtX8nqs0JdP-AsT3Ybx3D7g6DapygFP X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-05-10_04,2023-05-05_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxlogscore=999 clxscore=1011 spamscore=0 bulkscore=0 phishscore=0 adultscore=0 suspectscore=0 mlxscore=0 malwarescore=0 priorityscore=1501 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305100061 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org When core soft reset timeout happens, pullup doesn't check for the return value and proceeds setting up of event buffers and starts the controller. In this scneario, it is observed sometimes that the GEVTADDR LO/HI registers read zero while we are setting the run stop bit and we end up accessing address 0x00 leading to a crash. This series tries to address this issue by handling the timeout and return back appropriate error code to configfs for it to retry enumeration if it chooses to. Link to v1: https://lore.kernel.org/all/20230322092740.28491-1-quic_kriskura@quicinc.com/ Link to v2: https://lore.kernel.org/all/20230328160756.30520-1-quic_kriskura@quicinc.com/ changes in v3: Rebased on top of latest usb-next to resolve merge issues Fixed comments from v2 related to code styling changes in v2: Fixed comments addressing incomplete error handling in udc core Krishna Kurapati (2): usb: dwc3: gadget: Bail out in pullup if soft reset timeout happens usb: gadget: udc: Handle gadget_connect failure during bind operation drivers/usb/dwc3/gadget.c | 5 ++++- drivers/usb/gadget/udc/core.c | 21 +++++++++++++++++---- 2 files changed, 21 insertions(+), 5 deletions(-)